86 lines
2.3 KiB
C
86 lines
2.3 KiB
C
/*
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* Copyright (c) 2019 Intel Corporation
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <adc.h>
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#include <syscall_handler.h>
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#include <kernel.h>
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Z_SYSCALL_HANDLER(adc_channel_setup, dev, user_channel_cfg)
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{
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struct adc_channel_cfg channel_cfg;
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Z_OOPS(Z_SYSCALL_DRIVER_ADC(dev, channel_setup));
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Z_OOPS(z_user_from_copy(&channel_cfg,
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(struct adc_channel_cfg *)user_channel_cfg,
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sizeof(struct adc_channel_cfg)));
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return z_impl_adc_channel_setup((struct device *)dev, &channel_cfg);
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}
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static bool copy_sequence(struct adc_sequence *dst,
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struct adc_sequence_options *options,
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struct adc_sequence *src)
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{
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if (z_user_from_copy(dst, src, sizeof(struct adc_sequence)) != 0) {
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printk("couldn't copy adc_sequence struct\n");
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return false;
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}
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if (dst->options) {
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if (z_user_from_copy(options, dst->options,
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sizeof(struct adc_sequence_options)) != 0) {
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printk("couldn't copy adc_options struct\n");
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return false;
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}
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dst->options = options;
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}
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if (Z_SYSCALL_MEMORY_WRITE(dst->buffer, dst->buffer_size) != 0) {
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printk("no access to buffer memory\n");
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return false;
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}
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return true;
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}
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Z_SYSCALL_HANDLER(adc_read, dev, user_sequence)
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{
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struct adc_sequence sequence;
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struct adc_sequence_options options;
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Z_OOPS(Z_SYSCALL_DRIVER_ADC(dev, read));
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Z_OOPS(Z_SYSCALL_VERIFY_MSG(copy_sequence(&sequence, &options,
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(struct adc_sequence *)user_sequence),
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"invalid ADC sequence"));
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if (sequence.options != NULL) {
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Z_OOPS(Z_SYSCALL_VERIFY_MSG(sequence.options->callback == NULL,
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"ADC sequence callbacks forbidden from user mode"));
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}
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return z_impl_adc_read((struct device *)dev, &sequence);
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}
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#ifdef CONFIG_ADC_ASYNC
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Z_SYSCALL_HANDLER(adc_read_async, dev, user_sequence, async)
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{
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struct adc_sequence sequence;
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struct adc_sequence_options options;
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Z_OOPS(Z_SYSCALL_DRIVER_ADC(dev, read_async));
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Z_OOPS(Z_SYSCALL_VERIFY_MSG(copy_sequence(&sequence, &options,
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(struct adc_sequence *)user_sequence),
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"invalid ADC sequence"));
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if (sequence.options != NULL) {
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Z_OOPS(Z_SYSCALL_VERIFY_MSG(sequence.options->callback == NULL,
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"ADC sequence callbacks forbidden from user mode"));
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}
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Z_OOPS(Z_SYSCALL_OBJ(async, K_OBJ_POLL_SIGNAL));
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return z_impl_adc_read_async((struct device *)dev, &sequence,
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(struct k_poll_signal *)async);
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}
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#endif /* CONFIG_ADC_ASYNC */
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